Morfologia dos esporos de Sematophyllaceae Broth. ocorrentes em três fragmentos de Mata Atlântica, no Rio de Janeiro, Brasil

Abstract

In the present work the spores of seven species of the family Sematophyllaceae Broth. (Bryophyta) from three areas of Mata Atlântica were analyzed. For the spores' external morphology analysis, the direct method in glycerined gelatin was used and for the measurements the method of acetolysis was used. The largest and smaller diameters (in polar view) and the thickness of the wall were measured. The analysis was carried under optical microscope and scanning electronic microscope. The spores are isomorphic, from small to medium size, heteropolars, of subcircular amb, with proximalapertural region and granulated surface. The apertural region is irregular. The variations found between the spores of the different species are related to the size of the spores and the distribution of the trimming elements.